Blue Flower Wasp

A recent trip to some favourite wildflower spots in the Westernport Bay region rewarded me with fields of Milkmaids (Burchardia umbellata) hosting a variety of pollinating insects – hoverflies, bees, and this large, Blue Flower Wasp, Austroscolia soror (most likely).

Blue Flower Wasps are sometimes named Black Flower Wasp or Hairy Blue Flower Wasp.

They belong to the scoliid family of parasitic wasps. The female lays her single egg on a species of beetle larvae. To locate her host, the female wasp will sometimes burrow into the ground or rotting log, or follow the tunnels used by the grubs. She stings the larvae to paralyse them before depositing her egg.

Adult Blue Flower Wasps feed on nectar. They can sting but are generally considered non-aggressive.

Wedding Bush

At present, the sandy, heathy woodlands around Westernport Bay is perfect habitat for the eye-catching native Ricinocarpos pinifolius or Wedding Bush.

This delightful shrub flowers abundantly at this time of year and the clusters of aromatic, daisy-like flowers are a magnet for a range of native pollinators.

Wedding Bush is endemic to south-eastern Australia from Tasmania to Queensland and is readily available at good nurseries. Wedding Bush will grow to 2 or 3m and prefers well drained light soil. Perhaps in a large tub in this district?

Oh, and yes, Wedding Bush flower essence is used for promoting “commitment, dedication, and follow-through in relationships, work, and personal goals” – apparently.

 

Bird's Nest Fungus

How obscure can fungi species get?

At Bunyip State Park Buttongrass Walk

The tiny Bird’s-nest Fungus, Nidula emodensis, measures only a few millimetres across. Inside the ‘nest’ are egg-like peridioles that contain the spore. The peridioles are scattered by raindrops that fall into the nest (not by a spring action built into the fungus as proposed by early researchers!).

At labertouche Creek Bushland Reserve

Nidula emodensis grows on decaying wood and or humus and is not a particularly uncommon fungus except that it is often missed due to its tiny size. There are several species in the genera. N. emdoensis usually appears in autumn.

Wax-lip Orchid

The Wax-lip Orchid is a deciduous terrestrial orchid that is fairly widespread through generally drier woodlands of South-east Australia. Some seasons they can be locally common.

Westernport woodlands is a good spot to see this beautiful orchid at the moment. Their bright colour and relatively large flower makes them one of the easier orchids to spot.

‘Glossodia’ means ‘similar to a tongue-shape’, referring to the labellum.

There are two species, G. major and G. minor and the two will sometimes hybridize – good luck!

Hoverflies appear to be a common pollinator

If you find a colony in flower, it is sometimes possible, after some searching, to find an aberrant all-white version.

Wax-lips seem to be one of the first spring orchids to appear. Always welcome.

Striated Fieldwren

I have posted on this bird before, but it is always a delight to see one of these cryptic little wrens. A recent visit to Reef Island in Westernport Bay re-acquainted me with Calamanthus fuliginosus (‘calamanthus’ = grass-dwelling or pipit-like, ‘fuliginosus’ = abounds with soot – go figure!).

The Striated Fieldwren is a bird of coastal understory habitat. It has pretty limited distribution to southern Victoria and parts of Tasmania and southern NSW.

Striated Fieldwrens can be difficult to see at times. They usually remain well hidden close to the ground in the grasses and salt marshes, seldom far from the shoreline in my experience. Spring is usually the best time to see one, as the males in particular often sing loudly from the tops of the vegetation.

Some references suggest the bird is classed as a vulnerable species due to habitat loss and predation, although both the Commonwealth’s EPBC Act and the Victorian F&FG Act do not have the species listed as threatened – at the moment.

 

Mosquito-orchids

Mosquito-orchids belong to the Acianthus genus (akis = point, needle or barb, and Anthos = flower). There are about four species that grow in Victoria.

The most commonly found ones in this district are the Small Mosquito-orchid (A. pusillus – pusillus = tiny, little, puny)), Large Mosquito-orchid, (A. exsertus – exsertus = protruding, thrust forth) and the Mayfly Orchid (A. caudatus). Pusillus and exsertus can be hard to tell apart sometimes. Small Mosquito-orchids and Large Mosquito-orchids tend to flower through winter. Mayfly Orchids appear late winter to spring. 

Large Mosquito-orchid leaf - upper and lower sides

Both Mosquito-orchids have a heart-shaped basal leaf that is green on top and red-purple underneath. The leaf of the Small Mosquito-orchid is ground-hugging. Large Mosquito-orchid leaves are often about 1 cm above the ground.

Left - Large Mosquito-orchid    Right - Small Mosquito-orchid

The insect-like flowers appear on a stem that varies between 10 to 20cm tall. Large Mosquito-orchids are usually dark and Small Mosquito-orchids mostly are green.

Both species are fairly widespread and Small Mosquito-orchids in particular can appear in large colonies some seasons. Often there might only be a small proportion of plants in flower. Both are pollinated by tiny flies. They both grow in a variety of habitats but seem to prefer gravelly-sandy loams in shady locations of more open forests.

Maroonhood

There are probably over 60 species of greenhood orchids (Pterostylis spp - pterostylis = winged column) in Victoria, and they are nearly all a shade of green. However there are Rustyhoods and Maroonhoods, and maybe some others, that are members of the genus that are not green at all, or at least not all green.

Recently, I wanted to check the progress of the Cobra Greenhood colonies at The Gurdies NCR at Grantville (there are still plenty of flowers) and came across a single Maroonhood, Pterostylis pedunculata (pedunculata = small stalk).

Although described as common and widespread, often in large colonies, it has been some time since I’ve seen a Maroonhood - I’m not out and about as often these days.

The Maroonhood has a reddish-brown tip to the hood (galea). It grows to about 20cm tall in good conditions – generally damp and shady woodlands. There is a small rosette of leaves on the ground at the base of the flowering plant.

Maroonhoods are terrestrial orchids like all the other greenhoods but one day in Bunyip State Park I found one growing in the low fork of a tree. Apparently some are known to grow on the trunks of Tree Ferns.